The warning follows a particularly fraught period for crypto.
The Federal Reserve said firms should notify the regulator prior to engaging in crypto-related activities.
Two employees were at Bank of America's wealth management unit.
The SEC is preparing to delist Chinese companies that have failed to comply with U.S. audit requirements.
New agency guidance touched on the controversial policy debate about conflict-of-interest rules for brokers and advisors.
While SPACs were once a red-hot market, they've fallen out of favor and investor sentiment has waned.
The agency plans to require businesses to outline the risks a warming planet poses to their operations.
The agency said firms should stress test trading positions because of mounting global risks.
Lee, who has been a commissioner since 2019, served as acting chair of the agency last year.
Short selling has become a political lightening rod following the meme-stock mania that began last year.